vertex.glsl

uniform mat4 u_projTrans;

attribute vec4 a_position;
attribute vec4 a_color;
attribute vec2 a_texCoord0;

varying vec4 v_color;
varying vec2 v_texCoord0;

void main()
{
    v_color = a_color;
    v_texCoord0 = a_texCoord0;
    gl_Position = u_projTrans * a_position;
}